Roll chuck assembly for rolling mills of the backed-up working roll type



June 2, 1936.

H. H TALBOT 2,042,871 ROLL CHUCK ASSEMBLY FOR ROLLING MILLS @E TEEEAcKED-UP WORKING EOLL TYPE Filed Dec. 13, 1934 2 Sheets-Sheet l QFfg 1. f

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June 2, 193s. H. H. TALBOT 2,042,871

ROLL CHUCK ASSEMBLY FOR ROLLING MILLS OF THE BACKED-UP WORKING ROLL TYPEi ffy/77777 @l Q El w Q Nf` N Q ms. H

Q INVENTOR WTNES-SES Patented June 2, 1936 UNITED STATES PATENT OFFICEROLL CHUCK ASSElVIBLY FOR ROLLING MILLS OF THE BACKED-UP WORKING ROLLTYPE Application December 13, 1934, Serial No. 757,310

9 Claims. (Cl. 80-55) This invention relates to rolling mills of thebacked-up working roll type, and more particularly to an improvement inthe assembly Aof mechanism employed to retain the bearing chucks for therolls of such mills in their operative positions.

The common practice in the construction of mills of this type whereinsmall working rolls are used, is to mount the bearing chuck for thesmall working roll within the projected side walls of one of thebacking-up roll chucks. The use of this method of mounting chucks inmills in which roller bearings are used, presents a problem of retainingthe working roll chucks against axial displacement in such a way thatthey can be readily removed. The cause for this diculty is that theworking roll chucks are somewhat shorter than the backing roll chucksand, consequently, their outer ends are displaced inwardly from theother ends of the backing roll chucks, rendering the working roll chucksvery inaccessible for clamping to prevent axial displacement or forunclamping for the purpose of removal, and as it is necessary to removethe working rolls quite frequently, it is desirable that thedisassembli-ng and assembling of the working roll chucks be made assimple and easy as possible. Heretofore releasable clamping plates, orequivalent devices employing a plurality of bolts or screws which haveto be removed or released each time the working roll chuck is removed,have been customarily used for this purpose. Due to the inset of theworking roll chucks and the consequent diiculty in releasing the screwsor bolts of such clamp their use is rendered both awkward andinconvenient as well as undesirable from the standpoint of the timerequired to disassemble and reassemble them, which it is highlydesirable to minimize as much as possible.

With this in mind, it is an object of this invention to provide animproved meagnsmfor releasably holding the working rolchucks of abacked-up mill inplace in'thbackig'rll'chucks which is extremely simpleof construction, dependable in operation, and susceptible of beingadjusted to permit the removal and assembly of the working roll chuckswith' a Yminimum of effort and time.

This and various other objects, as well as they various other novelfeatures and advantages of the invention, will be apparent when thefollowing detailed description is read in conjunction with theaccompanying drawings, of which Fig. 1 is an end elevation of a rollingmill incorporating an embodiment of the invention, and

Fig. 2, a horizontal sectional view taken on the line II-II of Fig. lbut showing the working roll in plan.

Referring in detail to the drawings, the numeral I designates generallya housing of a rolling mill of the 4-high backed-up working roll type inthe window 3 of which there is arranged a pair of working rolls 4 and 5that are laterally supported by a pair of backing rolls 6 and l. Inconformance with the prevailing practice the necks 4a and 5a of theworking rolls 4 and 5 are mounted in a pair of bearing chucks 8 and 9which are in turn nested for vertical and endwlse movement in suitableopenings II and I2 provided therefor in the bottom and top respectivelyof the bearing chucks I3 and I4 in which the necks 6a and Ia of thebacking rolls 6 and 'I are supported. These latter chucks are themselvesmounted in the window 3 of the roll housing I with the upper onedisposed for vertical adjustment under the control of a screw-downmechanism I5.

To prevent any axial displacement of the backing roll chucks I3 and I4 aplurality of releasable end clamps I6 are provided which are held inplace by a plurality of suitable bolts II threadably engaged in the rollhousing I.

In accordance with this invention to hold the working roll chucks 8 and9 in place in the backing roll chucks a pair of latches I8 is providedin each backing roll chuck opposite the outer end of each working rollchuck. These latches, as shown, are provided with a substantial face|811 for engaging the working roll chucks and are pivotally supported inthe backing roll chucks by pins I9 extended through a pair of spacedbrackets 2l and 2 Ia formed on the backing roll chucks, the pins beingheld in place by collars ISa keyed to the pins between the two brackets2| and 2 Ia. Between the former of these brackets and the body proper ofeach chuck a suitable recess 22 is provided to receive and permit thelatch associated therewith to be moved completely out of the path ofmovement of the working roll chucks when disengaged so as to permit theworking roll chuck to be freely removed from the backing roll chuck.While, as illustrated in this embodiment of the invention, the latchesI8 are disposed to engage the outer end of the working roll chucks in amanner to prevent any outward movement thereof in the backing rollchucks and the inward movement prevented by anges 20 provided on theouter edges of the working roll chucks which seat in oisets ID in theedges of the backing roll chucks, it will be appreciated that bothmovements may be prevented by the latches.

To retain the latches I8 in their operative and inoperative positionsreleasable stops 23 are provided, the stops being so located as toengage the latches on one side when in one position and on the otherwhen in the other position. Such stops may be either simply screw boltsas shown, which must be unscrewed each time the latches are moved, orspring biased depressible spring-type stops which may be simply forcedinto the face of the backing roll to permit the latches to be movedthereover and automatically returned to their operative positions assoon as the latches are moved past them. In their preferred form thelatches are so shaped that the ones on the upper backing roll chuck willfall by gravity into their unlatched position when the stops 23 aremoved out of engagement with them. However, to assure and simplify themovement of these latches into and out of their operative andinoperative positions they are keyed or otherwise fastened for rotationon the pins I9 about which they are pivoted and these pins provided withnon-circular outer ends projected beyond the face of the housing for thereception of a turning tool by means of which they may be readily turnedby an operator from one position to another.

In practicing this invention, aswill be readily appreciated by thoseskilled in the art, the only operations necessary for the removal of theworking roll chucks in so far as their retention in the backing rollchucks is concerned, is to remove the latch-engaging stops 23 and turnthe latches i8 to their non-engaging positions.

As shown in Fig. 2, it is necessary to provide these latches at one endof the Working rolls only as the Working roll chucks are so mounted asto prevent their being moved axially on the necks of the working rolls.To accomplish this, an internal shoulder 23a is provided on the innerend of the bearing receiving opening in each of the working roll chucksto engage the inner end of the bearing cage 24 mounted therein, and thiscage held against axial movement on the roll neck by a collar 25 mountedon the inner end thereof, and a sleeve 26 mounted on its outer end, thelatter being in turn held in place by an assembled retaining ring 21mounted in a groove 28 provided for its reception adjacent the outerends of the roll neck.

While such comprises no part of this invention, the backing roll chucksshown are designed to be interchangeable so as to minimize thereplacement equipment necessary to maintain a mill in operativecondition. This accounts for the chucks at the two ends of the mill asillustrated in Fig. 2 being provided with bracket formations for thereception of working roll chuckengaging latches, although such latches,for the reasons referred to hereinbefore, lare provided at only one endof the rolls.

As will be readily appreciated by thos'e skilled in the art, the workingroll chuck retaining latch mechanism provided by this invention greatlyfacilitates the assembling and disassembling of the Working rolls andrepresents a very desirable improvement over the prior means employedfor this purpose.

According to the provisions of the patent statutes, I have explained theprinciple and mode of operation of my invention and have illustrated anddescribed what I now consider to represent its best embodiment. However,I desire to have it understood that, within the scope of the appendedclaims, the invention may be practiced otherwise than as specificallyillustrated and described.

I claim:

l. In a rolling mill of the backed-up working roll type a working rollchuck, a backing roll chuck designed to receive said working roll chuckand permit vertical and endwisemovement .of the latter therein, areleasable,l'atch for engaging and preventing endwise movement of theworking roll chuck, said latch being mounted in a recess in said backingroll chuck and means for moving it into and out of engagement with saidworking roll chuck.

2. A roll chuck assembly for use in a rolling mill of the backed-upworking roll type comprising a backing roll chuck, a working roll chucknested in said backing roll chuck, a latch pivotally mounted in a recessin said backing roll chuck adjacent the working roll chuck and movableinto and out of engagement with said working roll chuck to preventrelative endwise movement of the working roll chuck in the backing rollchuck.

3. A roll chuck assembly for use in a rolling mill of the backed-upworking roll type comprising a backing roll chuck, a Working roll chucknested in said backing roll chuck, a latch pivotally mounted in a recessin said backing roll chuck and movable into and out of engagement withsaid working roll chuck to prevent relative endwise movement of thelatter, and releasable means for retaining said latch in itschuckengaging position.

4. A roll chuck assembly for use in a rolling mill of the backed-upworking roll type comprising a backing roll chuck, a working roll chucknested in said backing roll chuck, a pair of latches pivotally mountedin recesses in said backing roll chuck in the sides thereof adjacentsaid working roll chuck and movable into and out of engagement with saidworking roll chucks, and means for releasably holding said latches intheir operative and inoperative positions.

5. A roll chuck assembly for use in a rolling mill of the backed-upworking roll type comprising a, backing roll chuck, a working roll chucknested in said backing roll chuck, a latch pivotally mounted in a recessin the side of said backing roll chuck adjacent the Working roll chuckand movable into and out of engagement with said Working roll chuck, anda pivot pin on which said latch is keyed mounted in said backing rollchuck with its end projecting outwardly therefrom to facilitate theadjustment thereby of said latch.

6. In a rolling mill of the backed-up working roll type, a backing rollchuck, 5:;911 mounted in said chuck, a working roll, a working rollchuck mounted on the end of said working roll and nested in said backingroll chuck and also held against relative endwise movement on saidworking roll, and a latch mounted/ in a recess in the side of saidbacking roll chuck adjacent the working roll chuck and movable into andout of engagement with said Working roll chuck to releasably hold thelatter in place in the backing roll chuck.

7. In a rolling mill of the backed-up working roll type, a backing roll,a pair of chucks for the opposite ends of said backing roll, a workingroll, a pair of working roll chucks mounted on the opposite ends of saidworking roll and nested in said backing roll chucks, means forpreventing relative endwise movement of said working i roll chucks onsaid working roll, and a latch/ mounted in a recess in the side of oneof said backing roll chucks adjacent the working roll chuck nestedtherein and movable into and out of engagement with said working rollchuck for holding it and the working roll against endwise movement.

8. A roll chuck assembly for use in a rolling mill of the backed-upworking roll type comprising a backing roll chuck, a working roll chuckof shorter length than the backing roll chuck nested in the latter atthe inner end thereof, and latching eans supported in a recess in a sideof the backing roll chuck adjacent the working roll chuck and inwardlyfrom the outer end thereof movable into and out of engagement with theworking roll chuck for preventing endwise movement thereof and means foroperating said latch from the outer end of the backing roll chuck.

9. A roll chuck assembly for use in a rolling 5 roll chuck and a freeend provided with an outer 10 face extending at an angle to the axis ofthe latch which fully engages the working roll chuck when in its latchedposition and is adapted to be moved in less than 90 to a full unlatchedposition, and means for releasably retaining said 15 latch in itsengaged and disengaged positions.

HOWARD H. TALBOT.

